Machine-Readable Science • ISSN 3054-3991

Morningness vs Eveningness: Systematic Review with ☸️SAIMSARA.

Name: SAIMSARA Evidence Object longevity::MORNINGNESS_VS_EVENINGNESS_SS
Creator: SAIMSARA
License: https://saimsara.com/license/

Longevity & Public Health

Issue 2, Volume 1, 2026

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DOI: 10.62487/saimsarad5075212

Editorial note

• Last update: 2026-04-27 09:00:14

What is this paper about

This paper shows that chronotype is not a trivial lifestyle preference, but a biologically meaningful pattern linked across a huge evidence base to mood, sleep, metabolism, behavior, and real-world performance. The full paper is worth reading because it clarifies how strongly eveningness clusters with risk, where the signal is most consistent, and whether aligning life with one’s internal clock could become a practical lever for better health and longevity.

Human-verified editorial review Verified by World ID proof-of-human. This editorial layer was submitted from a SAIMSARA account verified as a unique human.

Abstract: This paper aims to synthesize recent findings on the associations between morningness-eveningness chronotypes and a broad spectrum of health, behavioral, and physiological outcomes, as well as to identify key research gaps and implications for clinical practice. The review utilises 1136 original studies with 2634947 total participants (naïve ΣN). The extensive body of research reviewed highlights that morningness-eveningness (chronotype) is a fundamental biological trait with pervasive implications for human health and well-being. Across various adult and student populations, the reported prevalence of the evening chronotype varied widely, with a median of 15%. Eveningness is consistently associated with a higher risk of adverse outcomes, including increased depressive symptoms, anxiety, sleep disturbances, metabolic dysfunction, and poorer academic performance. For instance, adolescents with an eveningness chronotype preference had a higher probability of experiencing depression, anxiety, and stress symptoms compared to those with morningness or intermediate chronotypes. A significant limitation is the predominance of cross-sectional studies, which restricts causal inference. Future research should prioritize longitudinal intervention trials and the integration of multi-omics data to develop personalized chronotherapies, ultimately improving health outcomes by aligning daily routines with individual biological rhythms.

Keywords: Morningness-eveningness; Chronotype; Circadian rhythm; Mental health; Depression and anxiety; Psychometric properties; Adolescents; Sleep quality; Cardiovascular disease; Cognitive decline

Review Stats

Generated: 2026-02-28 09:51:16 CET
Plan: Pro (expanded craft tokens; source: Europe PMC)
Source: Europe PMC
Scope: Titles/Abstracts (tiab)
Keyword Gate: Fuzzy (≥60% of required terms, minimum 2 terms matched in title/abstract)
Total Abstracts/Papers: 1511
Downloaded Abstracts/Papers: 1511
Included Abstracts/Papers (all): 1449
Included original Abstracts/Papers (excl. Mixed): 1136
Reference Index (links used in paper): 170
Total study participants (naïve ΣN): 2634947

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Reference Index (170)

[1] Genetic predisposition for morningness-eveningness and economic disadvantage: Evidence from Finland over 25 years. — https://doi.org/10.1016/j.sleep.2025.106811
[2] Morningness-Eveningness Questionnaire: Reliability and factorial structure of the full and reduced versions in Spanish adolescents. — https://doi.org/10.1080/07420528.2025.2509634
[3] Dispositional mindfulness as a protective factor: Longitudinal effects on the relationship between morningness-eveningness, affective functioning, and depressive and anxiety symptoms. — https://doi.org/10.1080/07420528.2025.2491712
[4] Evaluation of Cardiovascular Disease Risk According to the Morningness-Eveningness Status in Adult Individuals. — https://doi.org/10.7759/cureus.86751
[5] Morningness-eveningness and mental health: Initial evidence of the moderating roles of mattering and anti-mattering. — https://doi.org/10.1080/07420528.2025.2453236
[6] Examining sex differences in morningness-eveningness and inter-individual variability across years of age: A cross-sectional study. — https://doi.org/10.1080/07420528.2024.2444667
[7] Associations between chronotype and psychiatric symptoms across the adult lifespan. — https://doi.org/10.1038/s41398-025-03782-w
[8] Correlation Analysis Between Time Awareness and Morningness-Eveningness Preference. — https://doi.org/10.5334/jcr.225

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